1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.util.Enumeration;
26  import java.util.Properties;
27  import java.util.Vector;
28  
29  /**
30   * <a href="OrderedProperties.java.html"><b><i>View Source</i></b></a>
31   *
32   * @author Brian Wing Shun Chan
33   */
34  public class OrderedProperties extends Properties {
35  
36      public OrderedProperties() {
37          super();
38  
39          _names = new Vector<String>();
40      }
41  
42      public Enumeration<String> propertyNames() {
43          return _names.elements();
44      }
45  
46      public Object put(Object key, Object value) {
47          if (_names.contains(key)) {
48              _names.remove(key);
49          }
50  
51          _names.add((String)key);
52  
53          return super.put(key, value);
54      }
55  
56      public Object remove(Object key) {
57          _names.remove(key);
58  
59          return super.remove(key);
60      }
61  
62      private Vector<String> _names;
63  
64  }